Portable cabin



FIG. 1 is an upper perspective view of the portable cabin showing my new design.

FIG. 2 is another perspective view thereof, showing an open position of the door;

FIG. 3 a front elevation view thereof;

FIG. 4 is back elevation view thereof;

FIG. 5 is a side elevation view thereof;

FIG. 6 is an opposite side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

The ornamental design for the portable cabin, as shown and described. 